Difference between revisions of "Pion Meeting March 26 2021 11AM ET"
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# Updates on pion detector studies (Elham) [https://moller.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=703] | # Updates on pion detector studies (Elham) [https://moller.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=703] | ||
| + | # Beam generator simulations (Raj) | ||
=Attendance= | =Attendance= | ||
| + | |||
| + | David, Elham, Raj, Jim, Wouter | ||
=Minutes= | =Minutes= | ||
| + | |||
| + | * Elham: pion detector simulations with moller and pion generator | ||
| + | ** Effect of moving lucite detector inwards has a smaller effect than increasing donut outer radius on the pi/e photo-electron rate | ||
| + | *** Combination of 26 cm lead donut, with shorter (6cm) and shifted lucite (same inner edge of lucite) gives good result | ||
| + | ** Changing concrete and lead radial and longitudinal thickness independently: | ||
| + | *** lead has most impact, but thinner lead at larger radial extent is also good | ||
| + | *** looks like weight can be relatively constant in optimization | ||
| + | ** Showermax mirror box bug fixed and wall thickness reduced | ||
| + | *** no effect on ratios | ||
| + | ** Reduce thickness off donut support flanges from 0.75" to 0.01" | ||
| + | *** no effect on ratios | ||
| + | * Raj: pion detector simulations with beam generator | ||
| + | ** rates consistent with moller generator results from Elham | ||
| + | ** but photo-electron rates appear consistent with zero and much smaller than the results from Elham | ||
| + | * TODO | ||
| + | ** verify how st.d. is defined: uncertainty on rmv or is there an additional factor sqrt(n) required? | ||
| + | ** how does geant4 treat primary electrons in moller scattering? is one electron still primary? | ||
| + | ** is moller scattering turned on for geant4? verify physics list | ||
| + | ** verify uncertainties on moller rates and moller photo-electron rates with 'chunking' method | ||
| + | ** run moller simulation on electroweak, store random state, reproduce visualization for events with charged particles in lucite | ||
| + | ** Elham will run beam generator to compare with Raj | ||
| + | * Vacuum levels in beam pipe | ||
| + | ** can we run at 1 Torr He in beamline? | ||
| + | ** TODO Wouter to work with Cip on implementing | ||
Latest revision as of 15:56, 26 March 2021
Back to Main Page >> Pion Meetings
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Agenda
- Updates on pion detector studies (Elham) [1]
- Beam generator simulations (Raj)
Attendance
David, Elham, Raj, Jim, Wouter
Minutes
- Elham: pion detector simulations with moller and pion generator
- Effect of moving lucite detector inwards has a smaller effect than increasing donut outer radius on the pi/e photo-electron rate
- Combination of 26 cm lead donut, with shorter (6cm) and shifted lucite (same inner edge of lucite) gives good result
- Changing concrete and lead radial and longitudinal thickness independently:
- lead has most impact, but thinner lead at larger radial extent is also good
- looks like weight can be relatively constant in optimization
- Showermax mirror box bug fixed and wall thickness reduced
- no effect on ratios
- Reduce thickness off donut support flanges from 0.75" to 0.01"
- no effect on ratios
- Effect of moving lucite detector inwards has a smaller effect than increasing donut outer radius on the pi/e photo-electron rate
- Raj: pion detector simulations with beam generator
- rates consistent with moller generator results from Elham
- but photo-electron rates appear consistent with zero and much smaller than the results from Elham
- TODO
- verify how st.d. is defined: uncertainty on rmv or is there an additional factor sqrt(n) required?
- how does geant4 treat primary electrons in moller scattering? is one electron still primary?
- is moller scattering turned on for geant4? verify physics list
- verify uncertainties on moller rates and moller photo-electron rates with 'chunking' method
- run moller simulation on electroweak, store random state, reproduce visualization for events with charged particles in lucite
- Elham will run beam generator to compare with Raj
- Vacuum levels in beam pipe
- can we run at 1 Torr He in beamline?
- TODO Wouter to work with Cip on implementing
